Stop Antenna Grom Raising While Playing A CD?

Sup Guys,

I currently have a Pioneer DEH-P8600MP radio head unit in my car. However, What I'm trying to find out is if there is any way I can keep the antenna from raising while playing a cd? Or if I'm listening to the radio then insert a cd I would like the antenna to retract. Is there any way this can be done?

Thanks in advance

mine does that now and the system is stock,it is supposed to do that.whoever hooked up your deck fucked something up,peace